Handling sprite animation with switch

[turtlesavage]

I'm currently handling sprite animation with a switch that changes the animation based on the directional arrow pressed. I'm using an SDL_Event switch to do so. The problem is lets say I hold down left, then while keeping left pressed i press right, then I let go of right and left is still pressed.

This is what happens.

Press left - left running animation plays

While still holding left I pres right - right animation plays

I let go of right and have left still pressed - default animation plays(idle)


Is it better to use a while loop or an if statement for this? What would you guys recommend?

[dhayden]

A switch is preferable I think because it expresses what you're doing better: you're taking different actions based on the value of a single expression.

To solve your problem, you need to look at the current state of the keys. So the logic should be something like:

wait for key up or key down.
switch(getKeyState()) {
...
}

Inside getKeyState() you will check to see which (if any) arrow keys are down. Decide what should happen if multiple keys are pressed before you start writing the code.

[turtlesavage]

Thanks, I'll look into that and let you know the solution I come to and/or any questions that come up

[turtlesavage]

I came up with a solution and it looks like this:

if (keyState[SDL_SCANCODE_RIGHT])
		{
			facingLeft = false;
			animation = runRightTexture;
			sprite = (ticks / 100) % 6;
			if (SDL_GetTicks() > time + 4)
			{
				++xCoord;
				time = SDL_GetTicks();
			}
		}
		else if (keyState[SDL_SCANCODE_LEFT])
		{
			facingLeft = true;
			animation = runLeftTexture;
			sprite = (ticks / 100) % 6;
			if (SDL_GetTicks() > time + 4)
			{
				--xCoord;
				time = SDL_GetTicks();
			}
		}